Mathematics Stack Exchange
Mathematics Stack Exchange

Questions tagged [standard-error]

For basic questions in statistics involving the properties or use of standard error of the sample points present in a simple random sample.

The standard deviation of the sampling distribution of a statistic is called the standard error.

123 questions
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Method to define a error in a sensefull way

I have two functions $A(t)$ und $B(t)$ (given as a set of values) and I want to quantify how similar they are. In context: I want to check how good some approximation regarding the solution of an integro-differential equation is and it depends on…
Martin
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Standard error for different distributions

I'm trying to estimate the standard error of the mean for measurements sampled from an unknown distribution. Wikipedia says: The standard error of the mean (SEM) can be expressed as: $$ \bar{\sigma}_x = \frac {\sigma }{\sqrt {n}}$$ where σ is…
Femkemilene
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Standard Error - Why the calculation works

I'm new to statistics, and in an effort to understand how Standard Error works I've put together a small data set to try and get my head round it and would be really grateful if you could answer a question I have (unfortunately scouring the site did…
Nick
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Cant find the error values correctly. Need Suggestions.

I have 6 observational data. $L_1,L_2,L_3,L_4,L_5 $ and $ L$. Each of them have seperate error values $\delta L_i$ and $\delta L$. All of these data are numbers such as $1.38e36, 3.45e33, 9.61e41$, etc., their units are the same.When I make the…
Ege Tunç
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Compute Sample Size for Specific Margin of Error & Confidence Level

I have a population that is in size equals to 65,536. The population follows a uniform distribution and is composed of discrete, ordered integer numbers. From this population I wish to identify the appropriate sample n so that it has a specific…
ex1led
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How to calculate the error of an function?

I have a function: $$L_R=4*\pi*5*R^2*J$$ I have error values for this R and J. So I want to find the error of $$L_R$$ Should I go for:$$L_R=f$$ $$df=L_{R_{error}}=\frac{\partial{f}}{\partial{x}}dx+\frac{\partial{f}}{\partial{y}}dy$$…
Ege Tunç
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What does the bracket way of showing error means?

The value of avagadro number is given in my book as 6.02217(4). Does this mean 6.022174 or 6.02214? Even some numbers have (12) like two digit numbers. Also what is this notation called? Why is it used for? Can't they use percentage or absolute…
JRBros
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Nonlinear regression standard error for two parameters?

I've been tasked with finding the standard error for two parameters in an equation, but I have no idea about statistics. If my question is answered, please point me in that direction. Otherwise, please help! The equation is $$\frac 1 V =…
Tom
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Standard error of estimate

In order to estimate total weight of rice of 100 bags, a sample of 25 bags was weighted giving the average weight of 50 kg. If the population standard deviation is 1.5 kg, estimate the total weight of 100 bags and find the standard error of the…
Asim Das
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